# メモハック 暗記カード vs Red Sheet

The clearest difference is iOS requirement: メモハック 暗記カード at 15.1 against Red Sheet's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. メモハック 暗記カード sells 6 in-app purchases, starting at $1.99 per 7 days and Red Sheet sells 1 in-app purchase, starting at $2.99 per year. Whichever you choose, the download price is not the number that matters.

メモハック 暗記カード ships an update weekly, Red Sheet every 4 days. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | メモハック 暗記カード | Red Sheet |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Weekly | **Every 4 days** |
| Size | 48 MB | 180 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hinata Tomoda](https://appshunter.io/developer/1790192988) | [N-Verse LLC](https://appshunter.io/developer/1868412567) |

## What reviewers say

### メモハック 暗記カード

[App page](https://appshunter.io/ios/app/ai/id6759282044)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| メモハック PRO 週額 | $1.99 | per 7 days |
| メモハックPro 月額 | $5.99 | per month |
| メモハックULTRA週額 | $5.99 | per 7 days |
| メモハック Ultra 月額 | $19.99 | per month |
| メモハックPro 年額 | $59.99 | per year |
| メモハック Ultra 年額 | $199.99 | per year |


### Red Sheet

[App page](https://appshunter.io/ios/app/red-sheet-kun-ai-study-sheets/id6775183078)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Red Sheet-kun Premium Annual | $2.99 | per year |


## Frequently asked questions

### Is メモハック 暗記カード free?

メモハック 暗記カード is free to download, with in-app purchases available.

### Is Red Sheet free?

Red Sheet is free to download, with in-app purchases available.

### Do メモハック 暗記カード or Red Sheet have ads?

Both メモハック 暗記カード and Red Sheet show ads.

### Which is updated more often, メモハック 暗記カード or Red Sheet?

メモハック 暗記カード ships an update weekly, and Red Sheet every 4 days. Most recently, メモハック 暗記カード was updated on October 10, 2026 and Red Sheet on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*